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. 2023 Jan 30;23(3):1526. doi: 10.3390/s23031526

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Simulated magnitude frequency responses of the second shadow filter with setting the natural frequency by A₂, while A₁ is used to adjust $Q = 1$ , (a) LP filter, (b) HP filter, (c) BP filter.

Simulated magnitude frequency responses of the second shadow filter with setting the natural frequency by A₂, while A₁ is used to adjust $Q = 1$ , (a) LP filter, (b) HP filter, (c) BP filter.